单项选择题

The word "institution" (line 1 ) most probably means ________.

A．a social practice
B．a social organization
C．a state law
D．an established habit
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单项选择题
Hardly ________ the audience started applauding.
A．had Prof. Smith finished his speech when
B．Prof. Smith had finished his speech when
C．had Prof. Smith finished his speech than
D．Prof. Smith had finished his speech than
单项选择题
________ the journey is not decided yet.
A．Whether will they have
B．Whether they will have
C．If will they have
D．If they will have
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